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Nezavi [6.7K]
1 year ago
10

If f(x) = -2x + 4, then f^-1(x) =

Mathematics
1 answer:
Nadusha1986 [10]1 year ago
7 0

Answer:

f^{-1}(x) = -\frac{x}{2} +2

Step-by-step explanation:

Consider the real number y such that  f ⁻¹(x) = y

f^{-1}\left( x\right)  =y\Longleftrightarrow f\left( y\right)  =x

We need to find y in order to determine the expression of  f ⁻¹(x)

f(y) = x ⇔ -2y + 4 = x

⇔ 4 - x = 2y

⇔ y = (4 - x)/2

\Longleftrightarrow y=-\frac{x}{2} +2

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